Respuesta :
The statement 'the waves have a trough' applies to transverse waves.
What are transverse waves?
Transverse waves are a type of wave in which their fluctuations need to be perpendicular to the wave.
- Conversely, longitudinal waves are waves in which their oscillations have the same direction of the wave.
- A wave can be defined as any type of disturbance capable of carrying energy but that does not involve motion.
In conclusion, the statement 'the waves have a trough' applies to transverse waves.
Learn more about transverse waves here:
https://brainly.com/question/13761336